Nozzle heating, cooling and ventilating system



Nov. 1s, 1932. G. C. LEMS 1,887,938

4 NOZZLE HEATING, COOLING, AND VEINTILATINGy SYSTEM -Filed March 19, 1931 5 Sheetshee't J N N N w N m A TTORNE Y Nov. 15, 1932.

G. C. LEWIS NOZZLE HEATING, COOLING, AND VENTILATING SYSTEM Filed March 19, 1931 3 Sheets-Sheet 2 QM.. \h.

XM; Wzar- ATTORNEY G. C. LEWIS Nov. l5, 1932.

, 19.31 3 Sheets-Sheet Filed March 19 ATTORNEY e Pstegd Novfls, 1932 UNITED -STATES PATENT OFFICE NOZZLE HEATING, COOLING AND VENTILATING SYSTEM i Application lied latch 19, 1931. Serial No.l 523,660.

My invention relates to a new and useful heating, cooling and Ventilating system for conditioning the air in a compartment or enclosure, such as a theatre, auditorium or the like, whereby the temperature and humidityare regulated and maintained at any desired sanitary. and comfortable point 'regardless of the atmospheric conditions pre vailing outside, and whereby the air in the enclosure is gradually changed to maintain the requisite amount of fresh air suitable for breathing purposes. 4

My invention furtherrelates to a heating,

cooling and Ventilating system of the characT I5 ter described, whereby the foregoing results are accomplished without causing 0r producing a draft which is annoying to most people and (injurious to many.

My invention further relates to a novel. construction and assembly of parts whereby the foregoing results may be attained with a minimum of effort and whereby extreme' accuracy in the control, regulation and general conditioning of the air within the compartmentfor enclosure is attained.

My invention further relates to a novel construction and assembly of parts whereby the air within the compartment or enclosure is circulated and recirculated with or with- Y. 'out admixture of conditioned or unconditioned air depending on the variable requirement of a particular case at a particular time.

My invention further relates to a novel method of drawing, expelling, passing and by-passingthe air, with respect to heating, cooling and humidifying equipment whether said air is already conditioned, not as yet conditioned or is an admixture, whereby extreme 4o accuracy of regulation is obtained, and which will be apparent from the following description in connection with the accompanying drawings, 'in which:

Fig. 1 is a diagrammatic vertical sectional 46 view of a compartment such asia theatre or the like, illustrating my invention.

Fig. 2 is a diagrammatic top plan view of Fig. 1.

Fig. 3i's a sectional plan view on an enlarged scale, taken on line 3-3' of Fig. 1 showing ditioned, having a ioor 2, the ceiling 3, the i,

roof 4 and the front and rear walls 5 and 6. In the basement 7 is installed an air conditioning apparatus which consists of the banks of sprays 8l and 9, the heater 10, the blower 11 and the blower actuating means '65 12. 14 designates an air duct positioned be? low the oor 2 and into which air from within the compartment 1 may flow thru suitably located floor inlets 15. The air duct 14 is adapted to communicate with the banks of sprays 8 and 9 thru openings 16 and 17 controlled by the dampers 18 and 19 and with the heater 10 thru the opening 20 controlled by the damper 21. 22 designates an air duct positioned below the air ductv 14 and adapted 7.5- to draw air from outside the compartment thru suitable openings 23,'in the front wall 5, which are fitted with weather louvers 24.

The flow of air thru the duct 22 into the banks of sprays 8 and 9 is controlled by the dampers 80' 25 and to the blower 11 by the dampers 27 controlling the lower opening 26. The air, whether from the duct 14 or 22, after passing by the bank of sprays 8, or the bank of sprays 9, or both, and with or without passing thru 8 the heater 10, which is provided with dampers 10-X, is drawn bythe blower` 11 and is forced upwardly thru the vertical air duct 28, which -terminates in the jet nozzle 29'wh1ch is adapted to inject air into the aspirating 9 nozzle SO-having the rear enlarged funnel portion 31 and which in turn discharges the air into the compartment 1 in a direction substantially parallel-to the ceiling 3 in the d1- rection of the arrows 32. 33 esignates an air inlet which leads from the atmosphere thru the roof 4 and ceiling of the building into the chamber 34, which is provided at the upper discharge end of the vertical air duct 28 leading from the blower 11. The,

air inlet 33 is controlled by suitable dampers 36. 37 designates a vertical air duct running parallel to the'air duct 28 and leading into the chamber 34, said air duct 37 communicating with the interior of the compartment 1 thru an opening 38 near the floor which is controlled by the dampers 39. 41 and 42 designate openings leading from the chamber 34 to thefinterior of the compartment 1. The interior of the compartment 1 is also in communication with the air duct 14 thru openings 43 near the floor 2 and at the front end of the compartment 1 said openings being controlled by suitable dampers 44. 46 designates standing rail return air openings which establish communication between the rear end of the compartment and the air duct 14.

The operation of the invention shown in Figs. 1, 2 and 3 is as follows:

If it is desired to raise the temperature within the compartment 1 but not in any way to vary the humidity thereof, the dampers 18 and 19 leading to the banks of sprays 8 and 9 are closed, and the dampers 21 leading to the heating element 10 are opened. The blower 11 then sucks the air from the duct 14, which in turn draws air from the compartment 1 thru the standing rail return openings 46, the 4floor openings `15, and 'the rear openings 43. The air thus sucked is passed over the heating element 10,- forced upwardly thru the air duct 28, and is injected thru the jet 29' into the enlarged funnel portion 31 of the aspirating nozzle 30. If an accelerated and substantial rise of temperature is required the dampers 36 are closed to prevent the entry of fresh cold air thru the roof inlet 33 and the heated air flows into the compartment 1 in the direction of the arrows 48. The force of the air emanating from the jet 29, creates a relatively strong current of air inthe direction of its travel, which results in a suction effect in the duct 37 and thru the openings 41 and 42, thereby drawing air from within the compartment l thru said openings and said duct into the chamber 34, where the air blown thru the jet 29 is mixed with the-air drawn from the compartment 1 before being injected into the latter. This results in rapid heating of the compartment since the air from Within the compartment, which is mixed with the air emanating from the jet 29, is initially relatively Warm. The air issuing from the jet 29, into the compartment 1 after having been admixedwith'air from within the compartment 1 in the chamber 34, then circulates in the direction of the arrows 48, 49 and 50, some of the air then `entering the duct 14 thru the floor openings 15, the rear wall opening 43, and the standing rail return air I opening -46 leading into the duct 14, whence it is again drawn by the blower 11 over thel heater 10 to be again forced up thru the duct 28, to be again admiXed with air drawn from the interior of the compartment 1 thru the duct 37 and the openings 41 and 42 for further recirculation. v

If it is desired to ventilate as well as to heat the interior of the compartment, fresh air is permitted to flow into the chamber 34 thru inlet 33 by opening the dampers 36, to be admixed in said chamber with air flowing thereinto from within the compartment 1 thru the duct 37 and the openings 41 and 42 and with heated air flowing from the duct 28 thru the jet 29. The fresh air entering thru the inlet 33 is thus warmed before being diffused in the compartment.

If it is desired to humidify the air, the dampers 18 and 19 leading to the banks of sprays 8 and 9 are opened to permit the air in the duct 14 to pass over said banks of sprays and thru a lower opening 26 which is controlled by the damper 27 into the blower 11 to be circulated in the manner heretofore designated. In addition to serving as humidifier the banks of sprays also serve to cool and wash the air. Ifl it is desired to raise the temperature of the air in its passage thru the conditioning equipment the dampers 21 controlling the openings 20 are opened to permit the flow of some air thru the heater 10 and vice versa.

When it is desired to cool and ventilate the compartment 1 it is merely necessary to open the dampers 24 controlling the openings 23 in the rear Wall'of the compartment, and the dampers 25 controlling the duct 22 thereby drawing outside fresh air past and thru the banks of sprays 8 and 9, whereby the air is washed and cooled `before being blown into the compartment 1 thru the duct 28 and jet 29. If further Ventilation is desired the dampers 36 controlling the inlet 33 are opened to permit the entry of fresh air into the chamber 34 to be admixed with the air from the jet 29 and circulated in the compartment.

,n When it is desired accurately to control the humidication lof the air, the dampers 18 and 19 or either are partly or completely opened or closed to effect an accurate adjustment of the amount of air flowing past the banks of sprays 8 and 9. Thus if the dampers 18 are closed, for instance, the air from the duet 14 will only pass thru the bank of sprays 9 whereas if the damper 19 was closed, or the dampers 18 and 19 were both opened, the air coming thru the openings 16, or 16 and 17,

will pass thru both banks of sprays 8 and 9 respectively thereby increasingl or decreasing the humidity of the air. 1

In Fig. 4 I have shown a modified form of my invention wherein I connect to the jet 29 and the roof fresh air inlet 33 to one end of a built-in aspirating nozzle 55, which commu-i nicates with the interior of the compartment .1 at the openings 56 and 57. In this construction of the invention wherein the duct 61 in' which flows the conditioned air terminates in a jet 62; in which is positioned the conical baiiie 63 which serves to r restrict the flow of the air therebyincreasing its pressure and velocity and which also ejects the air in a cylindrical stream into a mixing chamber 65` which communicates with the atmosphere thru the inlet 66 and with the interior of the compartment 1 thru the lower and upper openings 68 and 69 respectively.

In this construction the cylindrical stream of air emanating under pressure from the jet 62 will create a suction which will draw fresh air from outside the compartment 1 thru the inlet 66 and air from the compartment thru the lower openings 68. Thus the conditioned air flowing from the jet 62 is mixed with fresh air from the atmosphere and with air from within the compartment 1 before being injected into the latter thru the upper openings 69 of the chamber 65.

The remainder of the structure and operation relative to Figs. 4 and 5 is identical with that described in connection with Figs. 1, S and 3 and hence it was not shown in detai In order more accurately to regulate the heat: ng of the air I operate the dampers X positioned in front of and controlling the entry of the air into the heater 10. so that by completely closing or partly or fully opening the dampers 10X, the amount of heat imparted to the air being circulated by the blower 11 is accurately regulated and controlled. If to 'the manipulation of the dampers 10X is added the adjustment or ,manipulation of the dampers 18, 19 and 21 and 26 controlling ther respective air channels, it will be seen that an extremely accurate control and regulation of the heating, Ventilating and humidifying of the air within the compartment 1 is obtained.

By the provision of the openings 16 and 17 which are controlled by the dampers 18 and 19 I am enabled to by-pass the ar drawn by the blower 11 to force said. air thru one or both of the banks of sprays 8 and 9, thereby accurately regulating and controlling the degree of humidity within the compartment 1. Similarly the ventilation is regulated and controlled by manipulating the dampers 25 and 36 which control and regulate the iow of fresh air thru the duct 22 and the inlet 33 into the air conditioning devices and the mixing chamber 34 'and hence into the compartment 1.

By the construction shown in Fig. 5 I am enabled to mix and diffuse the air without the necessity of intake openings below and discharge openings above the zone of occupancy (designated by the arrow 71 in Fig. 5) which has been an essent' al characteristic of prior constructions since the air,with orwithout being suitably conditioned, is blown in a diffused current thru the openings 69 and will naturally` circulate in an upward and generally backward direction until an area of reduced pressure is reached when the air will gently descend and travel in a plain parallel to the floor 2 toward the bottom openings68. It is, of course, apparent that the structure illustrated in Fig. 5 may be positioned in any suitable part of the room, such as near the ceiling or midway between the ceiling and the floor since it combines in a single'unitary structure both the discharge outletsfor diffusing the conditioned air into the room and .the return air and fresh air inlet for mixing return air or fresh air with the conditioned alr.

It is to be noted that the banks of sprays8 and 9 serve as humidiiers and de-humidiiers at will, since when used in the cold condition they serve to reduce the index of relat've humidity and when used in warm or heated condition they serve to increase the relative humidity of the air passing there thru, due to the fact that moisture-carrying capacily of cold air is less than the moisture carrycapacityof warm or hot air.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a heating, cooling and Ventilating system, a compartment adapted to be heated,`

cooled, ventilated or to have the air therein otherwise conditioned, air cond'tioning devices including heating, cooling and humidifying elements, an intake air duct leading to said air conditionng devices, inlet openings in the floor of said compartment leading to said intake air duct, valved inlets intermediate said airduct and said respective air conldit'oning devices, a blower, a discharge vair duct into which the conditioned air is adapted to be forced by said blower, a discharge jet at the end of said discharge air duct, a mlxing chamber into which said discharge jet projects, a conduit communicating at its upper end with said mixing chamber and at its lower end with the inside of said compart-v ment at a point near the floor thereof and an aspirating nozzle leading from said mixing chamber to said compartment, said-aspirating nozzle having a flared portion juxtaposed -to the end of said discharge jet.

2. In a heating, cooling and Ventilating system, a compartment adapted to be heated, cooled, ventilated or to have the air therein otherwise conditioned, air conditioning devices including heating, cooling and humidifying elements, a primary intake air duct leading to said air conditioning devices, inlet openings in the floor of said compartment leading to said primary intake air duct, independently operable valved inlets intermediate said primary intake air duct and said air conditioning devices, a blower, a discharge air duct into which the conditioned air is adapted to be forced by said blower, a discharge jet at the end of said discharge air duct, a mixing chamber into which said discharge jet projects, a conduit communicating at its upper end with said mixing chamber and at its lower end with the inside of said compartment at a point near the floor thereof, an aspirating nozzle leading from said mixing chamber to said compartment, said aspirating nozzle having a flared rear portion juxtaposed to the end of said discharge jet, a secondary intake air duct leading from the atmosphere to said conditioning devices and means for closing said secondary intake air duct.

3. In a heating, cooling and Ventilating system, a compartment adapted to be heated.- cooled, ventilated or to have the air within otherwise conditioned, air conditioning devices including heating, cooling and humidifying elements, a primary intake air duct leading to said air conditioning devices, inlet openings in the floor of said compartment leading to said primary intake air duct, independently operable valved inlets intermediate said primary intake air duct and said air conditioning devices, a blower, a discharge air duct into which the conditioned air is adapted to be forced by said blower, a discharge jet atthe end of said discharge air duct, a mixing chamber into which said discharge jet projects, an aspirating nozzle leading from saidmixing chamber to said compartment, said aspirating nozzle having a flared rear portion juxtaposed to the end of said discharge jet, secondary intake air ducts leading'from the atmosphere to said air conditioning devices and said mixing chamber respectively and means for closing one or both of said -secondary intake air ducts independently of each other.

4. In a heating, cooling and Ventilating system, a compartment adapted to be heated, cooled ventilated or to have the air therein otherwise conditioned, airQ conditioning devices including heating, washing` and humidifying elements, an intake air duct leading to said air conditioning devices, inlet openings in the floors of said compartment leading to said intake air ducts, independently operable valved inlets intermediate said air duct and said air conditioning devices, a blower, a discharge air duct into which the conditioned air is adapted to be forced by said blower, a discharge jet at the end of said discharge air duct, a built-in combined aspirating nozzle and mixin chamber into which said discharge jet projects, said builtin combined aspirating nozzle and mixing chamber having open ends leading from and into said compartment, air inlets leading to the atmosphere, and means for closing and opening said air inlets.

5. In a. heating,cooling andventilatingsystem, a compartment adapted to be heated, cooled or ventilated or to have the air therein otherwise conditioned, air conditioning devices including heating, cooling and humidifying elements, an air duct leading to said air conditioning devices, inlet openings in the fi-oor of said compartment leading to said intake air duct independently operable valved inlets intermediate said air duct and said air conditioning devices, a blower, a discharge air duct into which the conditioned air is adapted to be forced by said blower, a discharge jet at the end of said discharge air duct, a mixing chamber into which said discharge jet projects, a conduit communicating at its upper end with said mixing chamber and at its lower end with the inside of said compartment at a point near the Hoor thereof, an aspirating nozzle leading from said mixing chamber to said compartment, and a conical baiileo-acting with the discharge end of said jet.

6. In a heating, cooling and Ventilating system, a compartment adapted to be heated, cooled, ventilated or to have the air therein otherwise conditioned, air conditioning devices including heating, cooling and humidifying elements, a primary intake air duct leading to said air conditioning devices, inlet openings in the floor of'said compartment leading to said intake air duct, independently operable valved inlets intermediate said air duct and said air conditioning devices, a blower, a discharge air duct into which the conditioned air is adapted to be forced by said blower, a discharge et at the end of said discharge air duct, a mixin chamber into which said discharge jet projects, secondary intake air ducts leading to said air conditioning devices and said mixing chamber, an aspirating nozzle leading from said mixing chamber to said compartment, and a conical baiie coacting with said jet.

GEORGE C. LEWIS. 

